There was a big choke comparison test in one of the mags a number of years ago (probably Clay Shooting). One gun and a whole range of different aftermarket chokes.....
The key point that I took from it was that most of the after market chokes threw much tighter patterns than they were supposed to. Which is where it gets complicated. Is a quarter choke (as in 10 thou constriction) not a quarter choke if it throws a "half choke" pattern.
I believe you have just uncovered the "Marketing Hype" relating to aftermarket chokes, perhaps without realising it?
If your "Super Extended, Ceramic Coated, Internally Chambered, Ported (or not), Multi Coloured, all singing, all dancing, Magic Choke" says it's a quarter, but is actually a half choke, then you shoot it and get spectacular breaks and puffs of dust at your average range, you are going to think it's patterning really well and must be superior to your original equipment chokes. Then you will tell all your friends, and for them, seeing is believing, so out comes their wallets to get some of these "magic" chokes, and Hey Presto! A legend is born!
A choke is only equivalent to the pattern it throws no matter what is written on it, and the only way to find out the pattern is to pattern test it.
For the record, I shoot Briley X2 Extended chokes in my Beretta which I've had since the 80's when Chris Potter started to import them. I use them because they are so easy to change without any tools, although I can't remember the last time I changed one from the two half chokes I have in there (and they both pattern tighter than marked!). They have lasted well!. So yes, I fell for the hype once when I was young and impressionable. :biggrin: